#include<stdio.h>
#include<math.h>
int main()
{
 int length,breadth;
 double radius,rect_area,circle_area;
 scanf("%d",&length);
 scanf("%d",&breadth);
 scanf("%1f",&radius);
 \formula
 rect_area=length*breadth;
 circle_area=m_pi*pow(radius,2);
 printf("%d0f\n",rect_area);
 printf("%d1f\n",circle_area)
 return 0;
}